#include<stdio.h>
#include<time.h>
#include<stdlib.h>
#define N 30000
#include<math.h>
int main()
{
    float x,y;
    int c=0,d=0;
    randomize() ;
    while(c++<=N){
        x=randomize(101);
        y=randomize(101);
        if(x*x+y*y<=10000)
        d++;
    }   
    printf("pi=%f\n",4.*d/N);
}